Spring 2010 Course Dates and Deadlines for Dentistry Students Note: Session 1 is the traditional 18-week semester. Course Event Session  1 1/5/10 to 5/15/10 Session 2 1/18/10 to 3/13/10 Session 3 3/22/10 to 5/15/10 Early Registration Begins 11/9/09 11/9/09 11/9/09 Open Registration Begins 12/3/09 12/3/09 12/3/09 Classes Begin 1/5/10 1/18/10 3/22/10 Registration Ends at Midnight 1/13/10 1/26/10 3/30/10 Last day to drop a class without a grade of "W" 1/13/10 1/26/10 3/30/10 Deadline to change from Credit to Audit 4/16/10 2/26/10 4/30/10 Deadline to Withdraw with "W" 4/16/10 2/26/10 4/30/10 Classes End 5/15/10 3/13/10 5/15/10 Additional dates and deadlines for the Spring 2010 term can be found of the Office of the Provost's Academic Calendar. Important: After the end of registration, you may not add, drop or change your courses via CheckMarq.